Waterproof neutral ink with nanometer level pigment and its prepn

Abstract

The waterproof neutral ink with nanometer level pigment consists of nanometer level material liquid 40 wt%, thickener 40-50 wt% and diluent 10-20 wt%, and has average size of 100-200 nm. The preparation process includes the following steps: setting the nanometer level material liquid in the compounding pot, adding the diluent while stirring, and stirring for further 30-90 min, adding the thickener, stirring for further 1-3 hr, and discharging. The neutral ink has bright color, stable quality, writing fluency and other advantages, and may be filled into different kinds of pens.

Description

technical field [0001] The invention relates to a gel pen ink, in particular to a nanoscale pigment waterproof gel pen ink and a manufacturing method thereof, belonging to the technical field of ink. Background technique [0002] At present, the high-grade special pen ink sold in the domestic and foreign markets has changed from dye type to pigment type. Compared with the dye type, a nano-scale pigment gel pen ink can effectively solve the problems of fading and bleeding, but the pigment type gel pen ink produced by the ordinary production process and formula has a large particle size, which affects Its permeability prolongs the drying time, and there will be plugging, disconnection, uneven ink output and other phenomena. [0003] Pigment-based inks are colored by dispersing fine particles of pigments in the medium used. The ideal dispersion system should have a "primary (primary) particle" pigment dispersion state. Nanoization of primary pigment particles will improve the ...

AI Technical Summary

Problems solved by technology

Compared with the dye type, a nano-scale pigment gel pen ink can effectively solve the problems of fading and bleeding, but the pigment type gel pen ink produced by the ordinary production process and formula has a large particle size, which affects Its permeability prolongs the drying time, and there will be plugging, disconnection, uneven ink output, etc.

[0003] Pigment-based inks are colored by dispersing fine particles of pigments in the medium used. The ideal dispersion system should have a "primary (primary) particle" pigment dispersion state. Nanoization of primary pigment particles will improve the quality and The use effect is greatly improved, but as the particles become smaller, the specific surface area will double, the van der Waals attraction between the particles will become larger, and the particles will easily aggregate, resulting in poor dispersion stability, aggregation, and stratification during storage. , separation, precipitation and other deterioration phenomena, it is difficult for the general process formula and equipment to make the pigment ink system achieve the nano-sized primary particles and make it show good dispersion stability

Furthermore, the stability of viscosity is another important technical issue. The viscosity of the product will directly affect the use effect of the gel pen. If the viscosity is too high, the ink output will become smaller, resulting in broken lines or unsmooth writing, and the viscosity is too high. Small, there will be ink leakage, which will affect the writing effect. Moderate and stable viscosity value is an important indicator of gel pen ink